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#1
08-12-2005, 09:30 PM
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Vacuum Spec Please
I have a 2000 blazer 4x4 with the 4.3.... I have recently notice a power loss and poor gas milage. I have replaced all the vacuum lines that the eye can see and found 1 that had a huge hole in it. I connected my vacuum gauge and it reads 15 at idle and 20 when it's accelerated. Is this the correct spec or should I check for more leaks?. Thanks Don
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2000 S10Blazer LT 4 Door 4x4 Billet Grille insert Winter 30X9.5QR15 BFG's All-Terrain T/A KO's 
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#3
08-13-2005, 08:54 AM
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The truck runs alot smoother at idle now. I checked the vacuum this morning and got 16-17 at 650 rpm's... Is this normal?
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2000 S10Blazer LT 4 Door 4x4 Billet Grille insert Winter 30X9.5QR15 BFG's All-Terrain T/A KO's
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#4
08-13-2005, 03:03 PM
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Re: Vacuum Spec Please
If you had a vacuum leak, the idle would be constantly changing seeing the IAC would be trying to compensate for the vacuum loss.
If it is level and relatively consistant, I would concentrate your efforts on a full tuneup.
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1995 Factory Blazer Service Manual for sale, PM if interested.
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